INTEGRATING VINTAGE DATA WITH MODERN DATA TO OPTIMIZE FIELD EVALUATION, WILMINGTON FIELD, CA

The Wilmington Townlot Unit (WTU) is located in the northeast end of the Wilmington Field anticline and has been in various stages of development since 1937. Warren E&P, Inc. has drilled 76 highly deviated “S” shaped wells into the Upper Terminal Formation. The modern logging data acquired from these wells has been very beneficial in the development of a 3D model in the central portion of WTU. However, a full WTU evaluation required the integration of up to an additional 1400 vintage wells covering the central portion as well as the remainder of WTU.

The overwhelmingly large amount of vintage data was filtered down to a select set of wells that were dispersed over all of WTU. The vintage well logs were then normalized and modernized. These updated logs were geologically interpreted and incorporated into the previously interpreted modern data set. The existing structure model of the central portion was extended out to the known OWC, increasing the modeled area by 66%. Petrophysical properties determined by the modern data set were then distributed throughout the model honoring correlations with the vintage geological interpretations.

Integrating vintage data with modern data was beneficial in creating a comprehensive 3D full field model. This model will be useful for identifying the remaining oil saturated sands throughout the lease and designing highly targeted well trajectories with optimum placement throughout WTU.